Lathe screw-machine.



G. K. ATKINSON.

LATHE SCREW MACHINE.

APPLICATION FILED APR. 4, 1911.

1,029,485, Patented June 11,1912. 7711/. 775i- W/f E555. W J5 www. 12%7 GEORGE K. ATKINSON, OF CINCINNATI, OHIO.

LATHE SCREW-MACHINE.

Specification of Letters Patent.

Patented June 11, 1912.

Application led April 4, 1911. Serial No. 618,958.

To all whom it may concern:

Be it known that I, GEORGE K. ATKiNsoN, of Cincinnati, in the county of Hamilton and State of Ohio, have invented certain new and useful Improvements in Lathe Screw-Machines; and `I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to lathe screw machines and more particularly to feeding mechanism therefor,-the object of the invention being to provide feeding mechanism which shall be simple in construction, comprising a minimum number of parts, and in which feed wheels can be driven directly from a scroll gear mounted on the lathe spindle, and also to provide means for pressing the feed rolls toward the stock to be fed and regulate the tension of the pressing means.

With this object in view the invention consists in certain novel features of construction and combinations of parts as hereinafter setforth and pointed out in the claims.

In the accompanying drawings, Figure l is a sectional view illustrating an emb-odiment of my invention. Fig. 2 is a sectional view on the line a-a of Fig. l, and Fig. 3 is a sectional view on the line bf?) of Fig. l.

l represents the tubular spindle of a lathe or screw machine and through which the stock indicated at 2 is to be fed. A frame or housing 3 is keyed or otherwise secured to the spindle 1 and provided with guideways l for the accommodation of movable carriers 5. Each carrier 5 is made U-shaped and has mounted therein the journals 6 of a feed wheel 7 Each feed wheel is made in the form of a gear, the teeth of which engage the stock to be fed. The feed wheels are pressed toward the stock by means of spring arms 8 secured to the frame 3 and connected with the carriers 5 by means of screws 9. By adjusting these screws, the tension of the spring arms can be adjusted and the pressure of the feed wheels against the stock can be regulated.

The gear wheels may be radially adjusted either to compensate for wear or to accommodate them to feed different sizes of rods without increasing or varying the pressure on them due to the tension of the spring arms 8, and this is effected by first removing the screws 9 from the carriers 5, and then by rotating the scroll 10 in either direction, the gear wheels may be moved radially toward or away from each other any desired distance and when adjusted at the desired distance apart, the screws may be inserted and adjusted so as to insure any desired pressure of the spring arms against the carriers in which the gear wheels are mounted.

A scroll 10 is mounted upon the spindle l so that the latter will be rotatable independently of said scroll under certain conditions. The scroll 10 consists of a drum or flanged disk having on one face, one or more spiral ribs 11 which constitute, in effect., spiral worms and the scroll is so located with respect to the feed wheels that these spiral worms will mesh with the teeth of the latter.

I/Vith the parts assembled as above described, the frame 3 carrying the feed wheels will rot-ate with the spindle 1 and, by reason of the engagement of the teeth of said feed wheels with the spiral teeth or gears of the scroll, the latter will also rotate with the spindle. When it is desired that the stock shall be fed, the rotation of the scroll will be retarded or stopped with the use of a suitable clutch. The frame 3 carrying the feed wheels will now have a rotation independent of the scroll and consequently the intermeshing of the teeth of the feed wheels to rotate in a manner to feed t-he stock forwardly or backwardly.

Having fully described my invention what I claim as new and desire to secure by Letters Patent, is,

1. In feeding mechanism of the character described, the combination with a tubular spindle and a frame secured thereto and rotatable therewith, of feed wheels mounted in said frame and having peripheral teeth, and a scroll mounted freely on the spindle and meshing with said feed wheels.

2. In feeding mechanism of the character described, the combination with a tubular spindle, of a frame secured thereto and rotatable therewith, said frame having guideways, carriers movably mounted in said'guideways, feed wheels mounted in said carriers and haymg peripheral teeth,'means for pressing said feed wheels in directions" toward each other, and a scroll mounted freely on the spindle and meshing with the peripheral teeth of the feed wheels.

3. In feeding mechanism of the character described, the combination with a tubular spindle, of a frame secured thereto and rotatable therewith, carriers movably mounted in said frame, feed wheels mounted in said 5 carriers and having peripheral teeth,springs 10 said feed wheel.

4. In feeding` mechanism of the character described, the combination with a tubular spindle and a frame secured thereto and rotatable therewith, of feed wheels mounted in Said frame and provided with peripheral teeth, a scroll mounted freely on the spindle and comprising a disk having two spiral gears on one face meshing with the peripheral teeth of the feed wheels.

In testimony whereof, I have signed this specification in the presence of two subscribing witnesses.

GEORGE K. ATKINSON. lVitnesses T. M. WooD,

JOSEPH L. LOGAN.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. C. x, 

